Safety locking device.



1. B. JAM|ESON, .IR. SAFETY LOCKING DEVICE.

APPLICATION FILED IAN.25. I915.

1,162,238. Patented Nqv. 30, 1915.

,B a%. J I WWI/6 JOSEPH B. JAMIESON, 51%., OF FITCHB'URG, MASSACHUSETTS.

SAFETY LOCKING DEVICE.

Specification of Letters Patent.

Patented Nov. so, 1915.

Application filed January 25, 1915. Serial No. 4,142.

To all whom it may concern:

Be it known that T, Josnrrr B. JAMIEsoN, Jr., a citizen of the United States, residing at F itchburg, in the county of Worcester and State of Massachusetts, have invented a new and useful Safety Locking Device, of which the following is a specification.

This invention relates to a safety locking device for use upon the casing of a carding machine or upon other machines in which a casing incloses a revolving element. The revolving element in such machines is often of a nature to cause serious injury to the op erator if he inserts his hand in the casing while the machine is in motion. Further-- more, the dangerous nature of the machine is commonly not evident while the machine is in motion, owing to the high speed of the revolving element.

It is one object of my invention to provide a safety locking device for such machines so constructed that it is impossible to open the door into the casing while the machine is in motion. In the operation of certain machines of this type it is necessary at times to move the revolving element slowly by power while the door of the casing is open, as for instance, in the operation of stripping or cleaning the cylinders of a carding machine. Accordingly it is a more specific object of myinvention to provide a construction in which the machinemay be set in motion while the door is open but in which the door, when once closed, cannot be opened while the machine is in motion.

With these objects in view my invention relates to certain devices, arrangements and combinations of parts which will be hereinafter described and more particularly pointedout in the appended claims.

A preferred form of the invention is shown in the drawings in which Figure 1 is a plan view of a portion of a machine with my safety locking device mounted thereon; Fig. 2 is an end elevation, partly in section, of the parts shown in Fig. 1, taken along the line 2-2 of said figure; Fig. 3 is a plan view of the locking device support which is mounted upon the door of the casing, and parts associated therewith; Fig. A is an end elevation of the parts shown in Fig. 3, and Fig. 5 is a perspective view of the rotatable member of the locking device.

I have shown my improved locking device mounted upon a machine having a casing and a door 11 pivoted at 12, the closed position of the door being shown in full lines in Fig. 2, and the open position in dotted lines in said figure. The shaft which supports the carding cylinder or otherrevolving elements, is indicated at 13 and is mounted in suitable bearings 14. Outside the bearing, the shaft 13 carries a beveled gear 15 meshing with a second beveled gear 16 mounted upon a substantially radial cross-shaft 17. The shaft 17 is supported at one end in a bearinglS mounted upon the support for the shaft bearing 14. At a point intermediate its length, the shaft 17 is rotatably. supported in a second bearing 19 which is carried by a flange 20 extending outwardly from the casing 10. At its outer end the shaft 17 is bluntly tapered, as indicated at 21, and carries a cross pin 22. The beveled gears 15 and 16 are constantly in mesh, from which it follows that the shaft 17 is at all times rotated simultaneously with the shaft 13. The remaining elements of my safety locking device are supported upon a plate 23 secured'to one end of the door 11, as by screws 24. The parts supported upon the'plate 23 comprise a rotatable member or sleeve 25 and a hand lever 26 carrying a pawl 27.

The sleeve 25 extends through a circular opening in the plate'23 and is provided at its outer end with a toothed flange 28 which is positioned between the plate 23 and a cover plate 29 spaced from the plate 23 by collars 30 and'secured theretov by screws 31.

At its inner end the sleeve 25 is provided with opposite L-shaped slots 32 each comprising an axial portion 32 and'a transverse portion 32". As the door 11 is closed the tapered end of the shaft 17 enters the sleeve 25 andthe cross pin 22 enters the axial portions 32 of the slots 32. If the pin is not alined with the slots in the sleeve 25, it will immediately come into alinement as the cylinder and shaft are started in rotation.

The direction of rotation of theshaft 17 with relation to the transverseportions 32 of the slots 32 is such that rotation of the shaft 17 will carry the pin 22 to the position shown in Fig. 4,'maintaining the pin in this position and making the sleeve and shaft inseparable so long as the shafts 13 and 17 continue to revolve. In order to open the door after the shaft 13 has ceased to revolve I make use of the hand lever 26 and the pawl-27 mounted thereon. The lever 26 is pivoted upon one of the sleeves 30 and is maintained in the position shown in Fig. 3 by a spring 35 encircling a stud 36 and having one end secured to the plate 23 by a screw 37.

VVhen the lever andpawl' are moved from the full line to the dotted lineposition in Fig. 3, the pawl engages one of the teeth upon the flange 28 and advances the sleeve 25 angularly in the direction in which the shaft 17 normally rotates. The axial portions 32* of the slots 32 will thus be brought into alinement with the cross-pin 22 and the opening of the door is possible through longitudinal separation of the sleeve and shaft.

Having thus described my invention it will be evident that changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope thereof as setforth in the claims and I do not wish to be otherwise limited to the details herein disclosed, but

WVhat I claim is 1. In a machine in combination with a rotatable element, a casing inclosing the same, and a door for said casing, a safety locking device for the door comprising a cross-shaft rotatable with said element, a. member rotatably mounted on said door, and interlocking devices on said shaft andsaid member by which saidshaft and memher are non-slidably connected'through the rotation of said shaft.

2.'In a machine in combination with a rotatable element, a casing inclosing the same anda door for said casing, a safety locking device for the door comprising a cross-shaft rotatable with said element, a member rotatably mounted on said door, interlocking devices on said shaft and said member by which said shaft and member are non-slidably connected through the rotation of said shaft, and means forreleas-V ing said 'member when the shaft is at rest, thereby permitting the opening of said door.

3. In a machine in combination with a rotatable element, a casing inclosing the same and a door for said casing, a safety locking device for the door comprising a cross-shaft rotatable with said element, a member rotatably mounted on said door, interlocking devices on said shaft and said member by which said shaft and member are non-slidably connected through the rotation of said shaft, and manually operable means for angularly advancing said member relative to said shaft while the member and shaft are at rest, thereby permitting the separation of said shaft and member and the opening of said door.

LIn a machine in combination with a rotatable element, a; casing inclosing the same and a door for said casing, a safety locking device for the door comprising a substantially radial cross-shaft rotatable with said element and having a laterally projecting pin near its outer end, a member rotatably mounted on said door and having an L-shaped slot formed adjacent its inner end positioned to receive and retain said projecting pin when the door is shut and said rotatable element is in motion, and manually operable means for angularly advancing said member relative to said shaft while the member and shaft are at rest, thereby permitting the separation of said shaft and member and the opening of said door.

5. In a machine in combination with a rotatable element, a casing inclosing the same and a door for said casing, asafety locking device for the door comprising a substantially radial cross-shaft rotatable with said element and having a laterally projecting pin near its outer end, a member rotatably mounted on said door and having an L-shaped slot formed adjacent its inner end, positioned to receive and retain said projecting pin when the door is shut and said rotatable element is in motion, said member having teeth upon its outer end, and a hand. lever and. pawl mounted on said door and movable to engage said teeth to angula-rly advance said member relative to said shaft and projecting pin, thereby releasing said door.

6. In a machine in combination with a rotatable element, a casing inclosing the same and a door for said casing, a safety locking device for the door comprising. a

substantially radial cross-shaft geared to rotate with said element and having a laterally projecting pin near its outer end, a locking. device support mounted on said door, a sleeve rotatably mounted in said support and retained within said support by a toothed flange, said sleeve being substantially concentric with said cross shaft when the door is closed and having an open inner end with an L-shaped slot formed adjacent thereto adapted to receive said shaft and said projecting pin, and a manuallyoperated pawl mounted on said support and effective to engage said toothed flange and advance said sleeve in the direction of rotation of said cross-shaft after the rotatable element and cross-shaft have come to rest.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

J OSEPH B. JAMIESON, J R.

Witnesses:

IRVING H. DAVIS, GUY W. SwALLow.

Copies of this patent' may be-obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 13:0. 

